Trolley-pole.



P.- HAMMER.

TROLLEY POLE.

APPLICATION FILED JAN. 13. 1917.

fifafifififi Patented May 14,1918.

2 SHEETS-SHEET I.

lNVENTOR Peder flammen \NITNESSES pm BY 31/ V04 ATTORNEY P. HAMMER.

TROLLEY POLE.

APPLICATION FILED JAN.13. 1917.

1 1266,4166. Patented May 1 1, 1918 2 SHEETSSHEET 2.

jg 41 INVENTOR pedef'fimmei'.

WITNESSES WWW/Mi,

ATTOR NEY PEDER HAMMER, "OF CHICAGO, ILLINOIS.

TROLLEY-POLE.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed January 13, 1917. Serial No. 142,268.

To all whom it may concern:

Be it known that I, Pnnnn HAMMER, a citizen of Norway, residing atChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Trolley-Poles, of which thefollowing is a specification.

This invention relates to trolley poles,- and more particularly to atrolley pole provided with means for locking .the pole against upwardmovement in the event of the trolley wheel running off of or jumping ethe trolley wire. One of the main objects of the invention is to providemeans whereby a trolley pole of standard construction can be providedwith means for preventing upward movement of the pole when .the. wheeljumps the trolley, such means being quickly and easily applied to thepole.v A further ob ject is to provide a trolley wheel which isrockably? mounted in the pole and is so connected to the means forlocking the pole against movement that, a very slight movement of .thewheel in a forward direction is sufiicient to lock the pole thuspreventing it from rising to any appreciable extent so as to damage thetrolley or guy wireszin the event of the trolley wheel leaving thetrolley wire. A further object is to provide a resilient mounting forthe trolley wheel supplemental to the mounting of the pole andindependent. therefrom which serves to maintain the wheel in properengagement with the trolley wire thus insuring proper contact of thewheel and wire surfaces and eliminating to a great extent the damage tothe wheel through arcing such as occurs where a good contact betweenthese elements is not obtained. ,Further objects will appear from thedetail description.

In the drawings:-

Figure 1 is a side View of a trolley pole and the locking means thereforconstructed in accordance with my invention,

Fig. 2 is. a front view of the same, the upper portion of the pole andthe trolley wheel being omitted,

Fig. 3 is a detail back view of the trolley wheel and .its mountings. I

Fig. 4 is a side view of the locking means for a pole partly in section,

Fig. 5 is a detail side view of the trolley wheel and the mountingtherefor,

Fig. 6 is a detail perspective view of the supporting plate for the lockcontrol means,

Fig. 7 is a detail perspective view of one of the trolley wheelsupporting plates,

Fig. 8 is a detail perspective View of the lock tripping arm,

Fig. 9 is a perspective view of the mounting of the trolley pole.

The trolley pole 1, which is of standard construction, is pivotallymounted at its lower end between the upwardly extending spaced lugs 2formed integral with the base plate 3 which is adapted to be secured tothe car roof. The pole is provided at its upper end with a fork 4. Atrolley wheel supporting plate 5 is mounted on one arm 4 of fork 4, anda similar plate 6 is mounted on the other arm 4 of the fork. Plate 5 isprovided adjacent itslower end with an integral outwardly extending stud7 which extends through an aperture of arm 4 This plate is furtherprovided, above stud 7, with an aperture which receives an outwardlyextending stub 8 formed integral with the grooved trolley wheel 9 at thecenter of one side thereof. Plate 5 is further provided, at its upperend, with an integral outwardly extending finger 10 which projectsthrough an arcuate slot 11 formed in arm 4 of the fork, this slot beingcurved on an arc struck from the center of the stud 7. Plate 6 isprovided with a stud 7 similar to stud 7 and a finger 1O similar tofinger 10 which projects through a slot 11 formed in arm 4* of the fork.This plate is also provided with an aperture 12 which receives the stub8 formed at the center of wheel 9 is axial alinement with stub 8. Thestuds 7 and 7 are also mounted in axial alinement, the trolley wheel 9thus being mounted for free rotation in the plates 5 and 6, and theplates being mounted on common axis so as to have movement 1n a forwardor backward direction in the fork 4 .of the trolley pole 1. A tensionspring 13 is secured at its outer end to-a lug 14 formed integral withthe arm 4 of the fork in front of the slot 11*, and at its inner end tothe finger 10* of trolley wheel supporting plate 6. A similar spring 13is similarly mounted and secured to the finger 11 of plate 5. These twosprings act to rock the plates 5 and 6, and consequently the trolleywheel 9, forward and upward about the pivotal axis of the plates, thisforward movement of the wheel being positively limited by the wall atthe forward ends of the slots 11 and 11*, the backward movement of thearm being positively limited by the walls at the back or rearward endsof the slots.

1 The stub 7 a of plate 6 is of such length as to extend through the arm1 of fork 1 so as to be flush with the'outer face thereof. This stub issquared adjacent its outer end to provide an integral nut like member 7being reduced and threaded beyond this member to provide a screw stem 7for securing the plate in the arm of the fork. A tripping arm 15 isprovided, adjacent its inner end with a squared aperture 16 which fitssnugly over the nut 7 of stub 7*, this arm being secured in position bythe nut 17 threaded on to the screw stem 7. By this means, when theplate 6 is rocked about its pivotal axis, the arm 15 will also berocked. When the pole 1 is raised,- by means to be later described, soas to force the trolley wheel 9 against the trolley wire 18, the wheel9, and consequently the plates 5 and 6, are forced backward and downwardinto the po sition shown in Figs. 1 and 5 of the draw-' ings so as tobring the fingers 10 and 10 of the plates against the walls at the backends of the slots 11 and 11 With the trolley wheel in this position thesprings 13 and 13* are under tension and tend to rock the trolley wheelforward and upward. These springs act in this manner, during the normaloperation of the trolley :pole, to hold the wheel 9 in close engagementwith the trolley wire 18 thus insuring proper contact between the wheeland wire ahd preventing to a large extent injurious arcing.-

When the trolley wheel is in normal position, the tripping arm 15 isinclined slightly downward and rearward, as-shown.

Adjacent each side of the trolley pole 1, and concentric with thepivotal axis thereof, an approximately semicircular rack 19 is securedto plate '3. Each of these racks is provided with inwardly directedteeth 20. A supporting plate 21 is secured on the pole 1 adjacent thelower end thereof by bolts 22 passed through the same and the pole, anda plate 23 mounted at the back of the pole. The plate 21 is providedwith a rectangular body portion 241 and a restricted neck25. Astandard'26 is provided at each side of the body portion 2%. These twostandards rotatab-ly support a cylinder 27 which is provided at each endwith an integral spur-pinion 28, a ratchet wheel 29 being providedintermediate the pinions and formed integral therewith. The pinions 28mesh with the racks 19, and the teeth of ratchet 29 are directedrearwardly relatively to the direction of travel of the. car inconrection with which the trolley. mechanism is used. The neck 25 ofsupporting plate 21 is provided, at each-side, with an upwardly means ofextending tab or ear 30. These ears are provided with alined openings inwhich is rockably mounted a shaft 31 on which is secured a pawl 32, thepawl being thus rockably supported between the two ears. The lower arm33 of this pawl is shaped to e11- gage the teeth of ratchet 29 so as toprevent rearward rotation of the same, when the pawl is depressed. Aspring pressed catch 34: is rockably mounted between two'lugs 35 on theneck 25 of plate '21. This catch is normally forced downward by a leafspring 36 secured on the neck 25 and in engagement with the catch, theouter end or head of the catch being shaped to engage over the upper endof the'upper arm '37 of pawl32. By this means, the pawl isnormally heldin raised or inoperative position against action of the tension springv38 which is secured to the lower arm 33 of the pawl and the plate '21 inadvance of the pivotal axis of the pawl.

With the pawl raised in this position, the

of the trolley pole. When the trolley pole movesin an upward or forwarddirection,

the pinio'ns 28 and consequently the ratchet wheel 29, will be rotatedrearwardly and downwardly. Obviously, if the pawl 32 is loweredso asto'b'ring the arm" 33 thereof into engagement with the teethofratchetwheel 29 rearward rotation of the ratchet wheel, andconsequently the pinijons 28, will be prevented thus looking the pole 1against forward" andiupward movement (A cable" 39 is'secured at itsupper end to theouter end of trip arm'15, and'atitslower end to the headof catch 34:, this cable being passed through suitable eyes or the likesecured "on the pole; This cable is of such length that, whenthetrol'ley wheel 9 leaves the wire 18 andis rocked forward in themannerfpre viously described, very slight upward movement of trippingarm 15 will besufficient to raise the catch 31 so as to release-arm 37of the pole 32 thus locking the pole against forward movement. As willbe noted, the tripping arm is relatively long, and the trolley wheel ismoved throu'ghan arc of comparatively short radius, the radiusofmovement of the trolley wheel being exceedingly small relatively to theradius of movement of the trolley pole. For this reason, when thetrolley wheel leaves the'trolle'y wire the.

pole will be locked against forward and up ward movement almostinstantaneously, any

appreciable upward movement of the pole being thus positively prevented,By this means, all damage to the trolley wires and guys which wouldresult from the pole being moved into a substantially vertical positionso as to extend a considerable distance above the trolley wire iseliminated. To insure accuracy of engagement of arm 33 of pawl 32 withthe teeth of ratchet wheel 29, a shoulder 33 is provided at the base ofarm 33 and is adapted to engage with a stub or lug 33 formed integralwith the supporting plate 21. I

To permit the trolley pole 1 to be released from the locking means, arm37 of pawl 33 is provided with an integral laterally extending finger40. This finger projects through an arcuate slot 41 through one oftheears 30 of neck 25 of the supporting plate. A suitable cord 42 issecured to the outer end of this finger and may be placed in anyposition in which it is easily accessible by the conductor of the car.By means of this cord, the pawl 32 may be returned to its normal orinoperative position so as to permit the trolley pole 1 to bemanipulated by means of the usual cable 43 so as to return the trolleywheel 9 into its operative position in contact with trolley wire 18.When the pawl is in normal position, the trolley wheel 9 will bereturned to its rearward or operative position thus lowering' thetripping arm 15 so as to permit the catch 34 to engage over the upperend of arm 37 of the pole, after which the tension on cable 42 isreleased.

A T standard 44 is secured at the front end of plate 3 in advance of theracks 19. A tension spring 45 is secured at its forward end to the headof standard 44, adjacent each end thereof. The innerend of each tensionspring is secured to a laterally extending arm 46 carried by the pole 1adjacent supporting plates 21. These arms extend through the racks andthe springs 45 are positioned outside of the racks, thus preventinginterference between the means for holding the trolley pole in raisedposition and the means for locking the trolley pole against movementwhen the trolley wheel 9 leaves the trolley wire 18.

A trolley control apparatus construction in accordance with my inventionis Well adapted to be used in connection with a trolley pole of standardconstruction, no changes being required in the pole with the exceptionof the provision of the arcuate slots 11 and 11 to accommodate thefingers 10 and 10 of the trolley supporting plates. The pinions andratchet wheel, as well as the pole and catch for holding it ininoperative position are all carried by the supporting plate 21, thisplate being adapted to be quickly and easily secured to the lower endportion of a trolley pole of standard construction by the simpleexpedient of passing bolts through the plate and the pole. In addition,as above pointed out, the arc of movement of the trolley wheel is ofsuch small radius compared to the arc of movement of the trolley polethat the pole is locked against movement practically instantaneouslywith the trolley wheel leaving the trolley wire thus preventing anyappreciable upward movement of the pole and the resulting damage to thetrolley wire and supports therefor.- In addition, the means for throwingthe locking means for the pole into operation also serves the functionof providing a cushion mounting for the'trolley wheel so as toat alltimes hold it in close contact with the trolley wire.

What I claim is a 1. In trolley pole control means, a trolley polepivotally mounted at its lower end, ar0- uate racks positioned at eachside of said pole concentric therewith, a ratchet drum rotatably mountedon said pole and provided at each end with a pinion the pinions meshingwith said racks, a pawl mounted on the pole for engagement with saidratchet drum so as to prevent upward movement of the pole about itsaxis, means for normally holding said pawl out of engagement with theratchet drum, a trolley wheel mounted in the upper end of the pole forengagement with a trolley wire, and connections between said pawl andwheel for releasing thepawl so as to permit engagement thereof with theratchet when the trolley wheel leaves the trolley wire. I

2. In trolley pole control means, a trolley pole pivotally mounted atits lower end, inwardly directed arcuate racks mounted at each side ofthe lower end of said pole and disposed concentric with the pivotal axisthereof, a ratchet drum rotatably mounted on the pole and providedadjacent its ends with pinions meshing with said racks, a pawl rockablymounted on the pole for engagement with said ratchet drum, means fornormally holding said pawl out of engagement with the drum, a trolleywheel mormted in the upper end of the pole for forward and rearwardmovement therein, and connections between said trolley wheel and themeans for holding the pawl out of engagement with the drum for releasingsaid pawl when the trolley wheel moves forwardly in the pole.

3. In trolley pole control means, a trolley pole pivotally mounted atits lower end and having a fork at its upper end, plates pivotallymounted on each arm of the fork on a common axis, each plate beingprovided with an upwardly directed bearing member adjacent its lower endand an outwardly directed finger at its upper end, and each arm of thefork having an arcuate slot to accommodate said finger, a trolley wheelrotatably mounted in said plates above the pivotal axis thereof, tensionsprings each having one end secured to the finger of each plate and theother end secured to the arm of the fork in advance of said fingelyarelatively long trip arm. secured to the bearing member of one of saidplates so as tov turn therewith, two spaced parallel racks mountedadjacent the lower endof said pole concentrio with the pivotal :axisthereof, a supporting plate detachably-secu-red on the pole adjacent thelower end thereof two pinions rotatably mounted in saidplate andmeshingwith said racks, a ratchet wheel intermediate said pin'ionandrigidly secured thereto and having its teeth directedrean wardly anddownwardly, a pawl rockably mounted in said plate and adapted to engagesaid ratchet, a catch carried by the Copies of plate and ada'ptedtoengage said pawl so as to normally hold the same outof engage.- mentwith the ratchet wheel, connections between-said catch and trip arm formoving the catchinto 'inoperative'positionso as to release the pawl whenthe trolley wheel is rocked forward, and means for normally rocking thetrolley pole forward and upward about its pivotal axis.

In-testimony whereof I affiX my signature in presence of two witnesses.

'PEDER Harman.

Witnesses:

ELIAS FIRMANN, I

-1 GAYHARDT A. "ANDERSEN.

this patent may be obtained for five cents each, by 'addressing theCommissioner of Patents,

. Washington, D. G.

